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Upstream commit 5b3b468ec (nc: use poll() instead of select())
changed `nc` to use poll(2) instead of select(2), obviously.
In busybox-w32 select(2) had already been hacked to support `nc`.
To avoid hacking poll(2) too the upstream change was reverted
(c2002eae3). Later `nc` was altered to include the code for both
poll and select (3c85cc0c4).
Make the changes necessary for poll(2) to work with `nc` on Windows.
These are all in the function windows_compute_revents().
Treat a character file that isn't a console as a normal file.
Without this `nc 127.0.0.1 1234 </dev/null` doesn't work.
Return 0 instead of POLLHUP if GetNumberOfConsoleInputEvents()
indicates no events are available. Without this communication
between two instances of `nc` which are both using keyboard
input isn't as asynchronous as one would like.
Only process key press events: key releases are ignored. Without
this `nc 127.0.0.1 1234` won't receive anything from the server
until the local user presses a key.
In the default case, which now includes disk files and character
files, detect polling for reads as well as writes. Without this
`nc 127.0.0.1 1234 <local_file` doesn't work.
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To investigate GitHub issue #200 it was necessary to perform
build on Window using the MSYS2/mingw-w64 toolchain. This
threw up some issues:
- The settings for _WIN32_WINNT and __USE_MINGW_ANSI_STDIO differ
from those in Fedora resulting in compiler errors and warnings.
Force the defaults I'm used to.
- The workaround to allow native compilation of mconf.c was broken
by a subsequent upstream change. Make it work again.
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This is a companion patch to 4319368c6 (Use gnulib poll, importing the
version from git, 2012-03-30) (Git's implementation of IsConsoleHandle()
was adjusted in the meantime).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Ron Yorston <rmy@pobox.com>
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